Power Assertions for Swift

Power assertions (a.k.a. diagrammed assertions) augment your assertion failures with information about values produced during the evaluation of a condition, and presents them in an easily digestible form.
Power assertions are a popular feature of Spock (and later the whole Groovy language independently of Spock),
ScalaTest, and Expecty.

For swift test

Note: SwiftPowerAssert injects instrument code into the family of XCTAssert() methods during tests. SwiftPowerAssert back up the source files before executing tests and restore automatically when the tests finished. However, the original files may not be restored due to an unexpected crash or something wrong. Please use it for the project under Git.

Nothing happens? If the test succeeds, nothing is output. If you always want to see rich ASCII art, enable the --verbose option. always output a diagram regardless of the success or failure of assertions.